|A few covers|
1st Award (A198F) 1966
2nd Award (A314X) January 1968
1st Tandem (T189) January 1968
3rd Award (A636X) 1970. Error on fly sleeve not a second printing and not the correct title.
Notes: These are all the covers I have for this title. I know there are more out there especially the 1972 edition as Tandem reprinted almost all Killmasters in that year.